Earphone loudspeaker structure

Abstract

The utility model provides an earphone loudspeaker structure, which comprises a shell, a rear cover, an upper magnetic ring basin stand, a lower magnetic ring basin stand, a plurality of magnetic rings and a vibrating diaphragm assembly, the vibrating diaphragm assembly is arranged between the upper magnetic ring basin stand and the lower magnetic ring basin stand, and the vibrating diaphragm assembly comprises a double-sided circuit plane vibrating diaphragm provided with a straight welding lead and a PCB (Printed Circuit Board) fiber support arranged below the double-sided circuit plane vibrating diaphragm; the plurality of magnetic rings comprise three groups of magnetic rings which are respectively an upper large magnetic ring and a lower large magnetic ring, an upper middle magnetic ring and a lower middle magnetic ring, and an upper small magnetic ring and a lower small magnetic ring which are respectively fixed on the upper magnetic ring basin stand and the lower magnetic ring basin stand according to the NSN polarity sequence from outside to inside, and the key structure of the loudspeaker structure comprises the upper magnetic ring basin stand, the lower magnetic ring basin stand and a shell, high structural precision and assembly consistency are achieved through the CNC engraving process. The vibrating diaphragm assembly adopts a direct welding lead design, so that the electrical performance and the consistency are improved; through a CNC engraving process glue sealing structure, the precision of the loudspeaker assembly gap is realized, and the sound distortion is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to audio equipment technical field more specifically, it is a kind of flat panel loudspeaker structure applied to earphone. BACKGROUND

[0002] The earphone loudspeaker widely used in current market adopts traditional structure, and it has the following technical problems: low assembly precision: traditional loudspeaker structure adopts injection molding accessory and manual assembly, the gap between key parts such as magnetic ring and diaphragm is difficult to control accurately, usually there is a large error, leading to sound distortion, unstable frequency response and other problems. Traditional magnetic circuit adopts single magnetic ring structure, and the magnetic flux density distribution is uneven, it is difficult to form a comprehensive, gradient-changing magnetic field in the working area of the diaphragm, which limits the driving efficiency and response speed of the diaphragm. Some loudspeakers still use copper needles, elastic sheets and other methods to connect the diaphragm electrode and the circuit board, which has the problems of poor contact, easy oxidation, etc., affecting the electrical performance and product reliability. The existing structure design is not conducive to automatic assembly, especially the magnetic pole direction and position alignment require high, manual adjustment error is large, and the consistency is poor, resulting in low production efficiency and high production cost. SUMMARY

[0003] Therefore, the utility model provides an earphone loudspeaker structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] An earphone loudspeaker structure, comprising a shell, a rear cover, an upper magnetic ring pot rack, a lower magnetic ring pot rack, a plurality of magnetic rings and a diaphragm assembly, the diaphragm assembly is arranged between the upper magnetic ring pot rack and the lower magnetic ring pot rack, the diaphragm assembly comprises a double-sided circuit plane diaphragm provided with straight welding lead and a PCB fiber support arranged below the double-sided circuit plane diaphragm; the plurality of magnetic rings comprises three groups of magnetic rings, which are upper large magnetic ring and lower large magnetic ring, upper middle magnetic ring and lower middle magnetic ring, upper small magnetic ring and lower small magnetic ring, and are fixed on the upper magnetic ring pot rack and the lower magnetic ring pot rack in the order of NSN polarity from outside to inside; the key structure of the loudspeaker structure comprises the upper magnetic ring pot rack, the lower magnetic ring pot rack and the shell, which are processed by CNC engraving process to realize high structural precision and assembly consistency.

[0006] In the preferred technical scheme, the upper large magnetic ring, the upper middle magnetic ring, the upper small magnetic ring, the lower large magnetic ring, the lower middle magnetic ring and the lower small magnetic ring are assembled in the upper magnetic ring pot rack and the lower magnetic ring pot rack after being magnetized.

[0007] In the preferred technical scheme, the upper large magnetic ring and the lower large magnetic ring are N polarity, the upper middle magnetic ring and the lower middle magnetic ring are S polarity, and the upper small magnetic ring and the lower small magnetic ring are N polarity; the upper magnetic ring pot rack and the lower magnetic ring pot rack are provided with groove positions matched with each magnetic ring structure, and each magnetic ring is embedded in the corresponding groove position to be installed on the upper magnetic ring pot rack or the lower magnetic ring pot rack.

[0008] In the preferred technical solution, each magnetic ring is assembled by the method of positioning and fixing after glue dispensing, and the magnetic pole sequence and structure are symmetrical, which improves the uniformity of the magnetic field.

[0009] In the preferred technical solution, the upper and lower sides of the diaphragm assembly are respectively provided with sealing assembly structures, which are connected between the upper magnetic ring yoke and the lower magnetic ring yoke through glue sealing; the lower magnetic ring yoke is provided with a glue overflow part, and the excess glue is overflowed outward during glue dispensing, so as to prevent the sealing glue from touching the double-sided circuit planar diaphragm and improve the assembly precision.

[0010] In the preferred technical solution, the upper magnetic ring yoke and the lower magnetic ring yoke have magnetic pole repulsion force when assembled, and a tight-fitting structure with a tolerance of -0.02 mm is arranged between the upper magnetic ring yoke and the shell to ensure the stability thereof.

[0011] In the preferred technical solution, the shell wraps the upper magnetic ring yoke and the lower magnetic ring yoke, and the rear cover is embedded in the shell and connected in a tight-fitting manner, so that the upper magnetic ring yoke and the lower magnetic ring yoke on the inner side are fixed again after the two are assembled.

[0012] In the preferred technical solution, the gap between the double-sided circuit planar diaphragm and the magnetic ring is controlled to be between 0.02 mm and 0.025 mm.

[0013] According to the above technical solution, compared with the prior art, the utility model has the following beneficial technical effects:

[0014] Three groups of magnetic rings are arranged in an NSN polarity alternating arrangement, a uniform magnetic flux density gradient is formed in the diaphragm working area, and the driving capacity of the diaphragm is enhanced; a magnetic flux channel is formed between adjacent magnetic rings, magnetic flux leakage is effectively suppressed, and the magnetic energy utilization rate is improved. The PCB support has the characteristics of structural and functional integration, can be used as a support and can also carry electronic components and circuit traces, saves internal space, and is suitable for small-sized and high-integrated earphone design. The gap between the diaphragm and the magnetic ring is controlled to be within the range of 0.02-0.025 mm, high sensitivity and low distortion are realized; the diaphragm assembly adopts a straight soldering lead design, which improves the electrical performance and consistency and reduces the faults caused by poor contact and oxidation; the electrical connection structure is simple, which improves the consistency and long-term reliability. The upper and lower magnetic ring yokes and the shell are processed by CNC engraving, the key fitting tolerance is controlled to be ±0.01 mm, the glue sealing structure is processed by CNC engraving, the precision of the loudspeaker assembly gap is realized, and the sound distortion is reduced. The optimized structural design and process improve the production efficiency and reduce the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0016] Figure 1 It is a decomposition structure schematic view of the present application.

[0017] Figure 2 It is a cross-section structure schematic view of the present application.

[0018] Reference signs: 1, rear cover; 2, upper magnetic ring holder; 3, upper large magnetic ring; 4, upper middle magnetic ring; 5, upper small magnetic ring; 6, double-sided line plane diaphragm; 7, PCB fiber support; 8, lower small magnetic ring; 9, lower middle magnetic ring; 10, lower large magnetic ring; 11, lower magnetic ring holder; 12, shell; 111, glue overflow part. DETAILED DESCRIPTION

[0019] The application will now be described in further detail with reference to the drawings. These drawings show only the essential features of the application and are not to scale. They are provided to illustrate the basic understanding of the application, and therefore only show the components related to the application.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] A earphone speaker structure, please see Figure 1 、 2The utility model provides a kind of earphone loudspeaker structure with optimized structure, high assembly precision and stable electrical performance, which mainly comprises: shell 12, rear cover 1, upper magnetic ring yoke 2, lower magnetic ring yoke 11, multiple magnetic rings, diaphragm assembly and the like. The magnetic field system of the loudspeaker is composed of three groups of magnetic rings each from top to bottom, which are: upper large magnetic ring 3, upper middle magnetic ring 4, upper small magnetic ring 5, and corresponding lower large magnetic ring 10, lower middle magnetic ring 9 and lower small magnetic ring 8. Each group of magnetic rings is magnetized separately before assembly, with the large magnetic ring set as N polarity, the middle magnetic ring as S polarity and the small magnetic ring as N polarity, achieving NSN polarity arrangement from outside to inside. The layout of the three groups of magnetic rings can form more uniform and wide magnetic flux density distribution in the entire diaphragm area, and compared with the traditional single magnetic ring structure, the driving magnetic field is more comprehensive and symmetrical. The NSN alternating polarity design forms magnetic flux channels in opposite directions between adjacent magnetic rings, avoiding magnetic flux leakage and improving magnetic energy utilization. The NSN polarity arrangement generates magnetic flux density gradient changes between magnetic rings, making the diaphragm receive stronger electromagnetic thrust, especially improving high-frequency response and transient response.

[0023] It is equivalent to concentrate magnetic force in the working area, improving the sensitivity and maximum amplitude of the diaphragm. Uniform magnetic field reduces deflection and uneven force during diaphragm movement, reducing mechanical and electromagnetic distortion. Sound wave output is clearer and cleaner, improving mid-high frequency performance.

[0024] Further, the upper magnetic ring yoke 2 and the lower magnetic ring yoke 11 are internally provided with magnetic ring embedding grooves corresponding in size and position, all the magnetic rings are fixed in the way of first dispensing adhesive and then embedding into the grooves, which ensures the symmetry of the magnetic pole direction and is conducive to generating a uniform magnetic field. After the magnetic rings are fixed, the adhesive is cured to form a stable structure. The three sets of magnetic ring structures have obvious structural recognizability with the NSN arrangement mode, which is convenient for CNC groove processing and magnetic pole alignment assembly, and improves the efficiency and consistency of automatic assembly. The diaphragm assembly is arranged between the upper magnetic ring yoke 2 and the lower magnetic ring yoke 11, which includes a double-sided line planar diaphragm 6 and a PCB fiber support 7 arranged below the double-sided line planar diaphragm 6. The double-sided line planar diaphragm 6 directly connects the electrode lead to the PCB conductive end point through direct soldering, avoiding the contact problem caused by traditional pin or spring contact, and improving the electrical performance and consistency. The direct soldering structure specifically refers to that the output lead of the diaphragm assembly is electrically connected to the preset welding point (such as the embedded lead pad or electrode terminal in the upper and lower magnetic ring yokes) in the speaker structure through direct welding. Compared with the traditional winding connection, this direct welding method has the advantages of simple structure, stable welding point, small electrical performance loss, etc., which helps to improve the product consistency and reliability, and realizes the integrated fixed connection of physical and electrical properties. The PCB fiber support has good mechanical strength and rigidity, and can provide uniform support for the diaphragm to prevent it from deforming or locally collapsing during vibration, thereby maintaining the accuracy and consistency of vibration. The support itself can be used as a circuit board, which is convenient for directly connecting the lead of the diaphragm to the conductive circuit or pad on it through direct welding, reduces the use of traditional connectors or springs, and improves the electrical reliability. The PCB support has the characteristics of structural and functional integration, which can not only be used as a support, but also can carry electronic components and circuit traces, saving internal space and being suitable for small-sized and high-integrated earphone design. The standardized PCB manufacturing process is convenient for mass production, has high size consistency, and can be assembled with the diaphragm assembly, which improves the efficiency of automatic assembly and reduces the error rate of manual work. The upper and lower diaphragm assemblies are provided with sealing structures, specific sealant is applied on the edge of the diaphragm assembly during assembly, and the diaphragm assembly is pressed between the upper and lower magnetic ring yokes to form an airtight structure. The lower magnetic ring yoke 11 is provided with a glue overflow structure 111 for guiding the excess glue to overflow outward, preventing the glue from invading the diaphragm area and affecting the vibration performance, thereby improving the assembly precision and yield.

[0025] Further, the lower magnetic ring yoke 11 assembled with the magnetic ring and the diaphragm is embedded in the shell 12 as a whole, and a circle of glue is applied on the inner wall of the shell for fixation. Then the upper magnetic ring yoke 2 is installed on the top of the shell, and mechanical cooperation is achieved through a tight-fitting structure of -0.02 mm. The upper and lower magnetic ring yokes will generate assembly repulsion due to the repulsion of the magnetic poles, and the tight-fitting structure is used to realize accurate alignment and maintain stability. Finally, the back cover 1 is pressed into the tail of the shell 12, and the back cover and the shell are also designed as a tight-fitting structure, which realizes secondary structure locking after assembly, and plays a limiting and reinforcing role on the upper and lower magnetic ring yokes.

[0026] Further, the upper magnetic ring yoke 2, the lower magnetic ring yoke 11 and the shell 12 are key structural components of the loudspeaker, and are processed by high-precision CNC engraving process. The process can achieve a machining tolerance of ±0.01mm, ensure the accuracy consistency of the magnetic ring groove, the sealing surface and the matching boundary, and effectively control the gap between the diaphragm and the magnetic ring to be between 0.02-0.025mm. After the installation of the double-sided circuit planar diaphragm 6, its two sides are in the magnetic field generated by the magnetic ring. Since the polarity of the magnetic ring is NSN alternately distributed, the magnetic flux is concentrated in the vertical direction, thereby driving the planar diaphragm to vibrate. The gap between the diaphragm and the magnetic ring is strictly controlled within 0.02-0.025mm, which ensures sufficient driving force while avoiding contact wear. After the overall installation of the loudspeaker structure is completed, the amplitude and electrical performance need to be detected after solidification. The loudspeaker structure drives the double-sided planar diaphragm to vibrate through the gradient magnetic field formed by multiple magnetic rings. After the sound signal is input, electromagnetic force acts on the diaphragm, thereby pushing the air to form sound. The straight-welding lead design eliminates the contact point and improves the electrical transmission efficiency. The sealed assembly structure effectively isolates the noise leakage and magnetic interference, and improves the sound quality performance.

[0027] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An earphone speaker structure, characterized by: The loudspeaker comprises a shell (12), a rear cover (1), an upper magnetic ring holder (2), a lower magnetic ring holder (11), a plurality of magnetic rings, a diaphragm assembly, the diaphragm assembly is arranged between the upper magnetic ring holder (2) and the lower magnetic ring holder (11), the diaphragm assembly comprises a double-sided circuit planar diaphragm (6) provided with straight welding leads and a PCB fiber support (7) arranged below the double-sided circuit planar diaphragm (6); the plurality of magnetic rings comprises three groups of magnetic rings, namely an upper large magnetic ring (3) and a lower large magnetic ring (10), an upper middle magnetic ring (4) and a lower middle magnetic ring (9), and an upper small magnetic ring (5) and a lower small magnetic ring (8), which are fixed on the upper magnetic ring holder (2) and the lower magnetic ring holder (11) in the order of NSN polarity from outside to inside, and the key structure of the loudspeaker structure comprises the upper magnetic ring holder (2), the lower magnetic ring holder (11) and the shell (12), which are processed by a CNC engraving process to realize high structural precision and assembly consistency.

2. A headphone speaker structure according to claim 1, wherein: The upper large magnetic ring (3), the upper middle magnetic ring (4), the upper small magnetic ring (5), the lower large magnetic ring (10), the lower middle magnetic ring (9) and the lower small magnetic ring (8) are assembled on the upper magnetic ring holder (2) and the lower magnetic ring holder (11) after being magnetized.

3. A headphone speaker structure according to claim 2, wherein: The upper large magnetic ring (3) and the lower large magnetic ring (10) are N-polarity, the upper middle magnetic ring (4) and the lower middle magnetic ring (9) are S-polarity, and the upper small magnetic ring (5) and the lower small magnetic ring (8) are N-polarity; the upper magnetic ring holder (2) and the lower magnetic ring holder (11) are provided with groove positions matched with the structures of the magnetic rings, and each magnetic ring is embedded in the corresponding groove position to be mounted on the upper magnetic ring holder (2) or the lower magnetic ring holder (11).

4. A headphone speaker structure according to claim 3, wherein: Each magnetic ring is assembled by using a positioning and fixing mode of first glue dispensing and then positioning, the magnetic pole order is symmetrical with the structure, and the magnetic field uniformity is improved.

5. The earphone speaker structure according to claim 1, wherein: The diaphragm assembly is provided with sealing assembly structures above and below, respectively, the structures are connected between the upper magnetic ring holder (2) and the lower magnetic ring holder (11) through glue dispensing sealing, the lower magnetic ring holder (11) is provided with a glue overflow part (111), excess glue is overflowed outward during glue dispensing, the double-sided circuit planar diaphragm (6) is prevented from being touched by the sealing glue, and the assembly precision is improved.

6. The earphone speaker structure according to claim 1, wherein: The upper magnetic ring holder (2) and the lower magnetic ring holder (11) have magnetic pole repulsion force during assembly, a tight fitting structure with a -0.02mm tolerance is arranged between the upper magnetic ring holder (2) and the shell (12) to ensure the stability.

7. The earphone speaker structure according to claim 1, wherein: The shell (12) wraps the upper magnetic ring holder (2) and the lower magnetic ring holder (11), the rear cover (1) is embedded in the shell (12) and is connected in a tight fitting mode, and the two play a secondary fixing role on the inner side of the upper magnetic ring holder (2) and the lower magnetic ring holder (11) after assembly.

8. The earphone speaker structure according to claim 1, wherein: The gap between the double-sided circuit planar diaphragm (6) and the magnetic ring is controlled to be between 0.02-0.025mm.

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